Pause CAN broadcast on engine stop #3665

firmware/controllers/algo/engine.h

@@ -116,6 +116,11 @@ public:
 	// todo: technical debt: enableOverdwellProtection #3553
 	bool enableOverdwellProtection = true;
 
+	/**
+	 * Sometimes for instance during shutdown we need to completely supress CAN TX
+	 */
+	bool allowCanTx = true;
+
 	// used by HW CI
 	bool isPwmEnabled = true;
 

firmware/controllers/lua/lua_hooks.cpp

@@ -496,6 +496,11 @@ void configureRusefiLuaHooks(lua_State* l) {
 		return 1;
 	});
 
+	lua_register(l, "enableCanTx", [](lua_State* l) {
+		engine->allowCanTx = lua_toboolean(l, 1);
+		return 0;
+	});
+
 	lua_register(l, "crc8_j1850", [](lua_State* l) {
 		uint8_t data[8];
 		uint32_t length = getArray(l, 1, data, sizeof(data));

firmware/hw_layer/drivers/can/can_msg_tx.cpp

@@ -53,6 +53,10 @@ CanTxMessage::~CanTxMessage() {
 		return;
 	}
 
+	if (!engine->allowCanTx) {
+		return;
+	}
+
 	if (engineConfiguration->verboseCan) {
 		efiPrintf("Sending CAN message: SID %x/%x %x %x %x %x %x %x %x %x", CAN_SID(m_frame), m_frame.DLC,
 				m_frame.data8[0], m_frame.data8[1],